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Sql test in Hackerrank
Test duration of 1 hour based on probability and control statements
I have prior knowledge about various machine learning algorithms.
Linear Regression
Logistic Regression
Decision Trees
Random Forests
Support Vector Machines
Naive Bayes
K-Nearest Neighbors
Gradient Boosting
Neural Networks
I have studied and used various data visualization techniques including bar charts, line graphs, scatter plots, and heat maps.
I have experience creating bar charts to compare data across categories
I have used line graphs to show trends over time
I have created scatter plots to identify correlations between variables
I have used heat maps to visualize data density and identify patterns
Normal distribution is a probability distribution that is symmetric and bell-shaped.
It is also known as Gaussian distribution.
It is characterized by mean and standard deviation.
Many natural phenomena follow normal distribution, such as height and weight of individuals.
68% of the data falls within one standard deviation of the mean, 95% within two standard deviations, and 99.7% within three standard deviations.
It is wid...
SQL jobs include database administrator, data analyst, data scientist, business intelligence analyst, and software developer.
Database Administrator
Data Analyst
Data Scientist
Business Intelligence Analyst
Software Developer
I applied via Approached by Company and was interviewed in Apr 2023. There were 2 interview rounds.
To calculate cumulative sum for a given table
Sort the table in ascending order based on the column you want to calculate the cumulative sum for
Add a new column to the table to store the cumulative sum
Iterate through each row of the table and calculate the cumulative sum by adding the current row's value to the previous row's cumulative sum
Store the cumulative sum in the new column for each row
Yes, I have experience in both operations and data entry roles.
I have worked as a data entry operator for a pharmaceutical company where I was responsible for entering patient data into the system.
In my previous role as an operations analyst, I was responsible for analyzing data and creating reports for the management team.
I have experience using various data entry software such as Microsoft Excel and Google Sheets.
I a...
Yes, I can do data entry work as a data analyst.
Data entry work is a part of data analysis process.
I have experience in data entry work and can perform it efficiently.
Data entry work includes entering data into spreadsheets, databases, or other software.
I understand the importance of accurate data entry for effective analysis.
I applied via Approached by Company and was interviewed in Apr 2023. There were 6 interview rounds.
Operation questions like vlookups, Hlookups, xlookups etc,.
Reporting questions like pivot tables, typing speed, power pivots, pricing sheet preparation
SQL queries like joins, aggregation functions, filters etc,.
I can prepare a bar chart with product operations data within a few minutes.
I have experience using data visualization tools like Tableau, Power BI, or Excel to quickly create bar charts.
I am proficient in organizing and cleaning data to ensure accurate representation in the chart.
I can customize the chart with relevant labels, colors, and titles to make it visually appealing and easy to understand.
You can merge multiple Excel files together using the 'Consolidate' feature in Excel.
Open Excel and go to the 'Data' tab
Click on 'Consolidate' in the 'Data Tools' group
Select the files you want to merge and choose the desired options
Click 'OK' to merge the files together
I applied via Naukri.com and was interviewed in Apr 2024. There was 1 interview round.
Test was based on SQL, coding and MCQ. Coding involved nested query.
There are 2 coding challenges and 7 objective questions
I applied via Job Portal and was interviewed in Oct 2024. There was 1 interview round.
In the second technical round interview asked me about advanced sql topics, theory questions and two coding questions in joins and window functions.
I applied via Company Website and was interviewed in Jul 2023. There were 4 interview rounds.
Number sires, clock, logic, arithmetic, geometry
Code test basic, ans the basic knowledge, write code
Python is a high-level programming language known for its simplicity and readability.
Python is widely used for web development, data analysis, artificial intelligence, and scientific computing.
It emphasizes code readability and uses indentation to define code blocks.
Python has a large standard library and a vibrant community of developers.
Example: print('Hello, World!')
Example: import pandas as pd
Python is a versatile programming language used for data analysis, web development, artificial intelligence, automation, and more.
Data analysis and visualization
Web development (Django, Flask)
Artificial intelligence and machine learning (TensorFlow, PyTorch)
Automation and scripting
Scientific computing (NumPy, SciPy)
Python is a high-level programming language known for its simplicity and readability.
Python is an interpreted language, meaning it does not need to be compiled before running.
It supports multiple programming paradigms, including object-oriented, imperative, and functional programming.
Python has a large standard library and a thriving community, making it versatile and widely used.
Example: Python is used for web develop...
Object-oriented programming (OOP) is a programming paradigm based on the concept of 'objects', which can contain data and code.
OOP allows for the organization of code into reusable components called classes.
Classes can have attributes (variables) and methods (functions) associated with them.
In Python, everything is an object, and classes can be defined using the 'class' keyword.
Encapsulation, inheritance, and polymorph
An array in Python is a data structure that stores a collection of elements of the same type.
Arrays can store elements such as integers, floats, or strings.
Arrays are indexed starting from 0, with elements accessed using their index.
Example: arr = ['apple', 'banana', 'cherry']
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